Bilge pump



May 3, 1932.

s. E. AARON 3556,36?

BILGE PUMP Filed July l1, 1929 E ShQetS-Sheet l U.' h 7 ff-+4 BILGE PUMP Filed July ll, 1929 7, Sheets-Sheet 2 CTI Patented May 3, 1932 PATENT 'OFFICE soL'oMoN' E13-WARD AARON, or BOSTON, MASSACHUSETTS BLGE Application mea July 11,

This invention relates to improvements in means for relieving the bilge of boats or vessels of the gasoline vapors and other undesirable liquids which may accumulate therein.

One of the prime objects of this invention is to provide a means for drawing gases from any part of the boat without shifting any of the suction elements, such as hose and the like.

Another object of this invention is to provide a device for creating three different suctions, at three distinct points in the boat, and to render each of these suctions useful at the will of the operator.

Other objects of this invention will appear from the following detailed description of the device as disclosed in the single sheet of' drawings, which is herewith made a part o this application.

In the drawings- Figure 1 illustrates a longitudinal crosssectional view of a boat disclosing the bilgeI pumping system installed therein.

Figure 2 is a top plan of a boat partly broken away.

Figure 8 illustrates to an enlarged scale a vertical cross-sectional view of a portion oli the bilge pumping system, showing the main features connected therewith.

Figure 4 represents one modiiication of the means Jfor giving reciprocating motion to the pump plunger.

Figure 5 illustrates a cross-sectional view of the pump plunger and cylinder in open communication with the main passage, and disclosing check valves therein.

As one modification of this invention, it is Y preferred that number 1 designate the shell or outer portion of a boat, which may be of any size or type, in which this system of bilge pumping could be used to advantage, particularly in the case of a motor boat, in which a great many explosions are caused by the engine back-firing, owing to the use of improper mixture, and where in many instances the gasoline has been supplied or obtained by the opening of a carburetor and the filling of a small can with the gasoline for Vuse in priming the engine and for like purposes.

PUMP

192e. seriall No. 377,579.

The gasoline tank 2 is usually loca-ted inthe bow of the boat 1,and` sometimes in iilling the tank 2 a certain amount of gasoline is allowed to drip or spill, and seeps into the timbers of the boat and, therefore, cannot be removed and functions to leave dangerous fumes in that particular location. The same conditions apply to a more or less extent in the stern of the boat where the engined, pump and plunger element 4 are usually located'. y

This invention relates primarily to a device or system for eliminating or pumping the fumes, vapors and liquids from three distinct points in the boat 1, that is at the bow and stern' and near the center thereof,l as clearly disclosed in Figure 1 at 5,; 6 and 7. The object is to arrange the suction elements in such a manner that they will tunetion through one ejector asclearly disclosed in Figure 3 wherein number 8 designates an ejector casing having a pressure inlet passage 9 for the actuating stream, a. suction passage 10 for the entrained stream, and an outlet 11 for the combined actuating and entrained stream. The pressure inlet passage 9 is provided with an inlet oriiice 12 through which the water under pressure enters from any suitable source, such for instance as a line' 13 leading in open communication through an opening 14 in the shell of the boat 1, thereby making it possible for the bilgel pump to draw clear andA clean water for the service inthe ejector 15. l l

At a suitablelocationin the line 13 and in open communication therewith is located a pumpingI cylinder 16j having movably positioned therein the plunger 4 and the pump piston 1'?, the. plunger 4 may be connected in any suitable manner to the prime mover 3, in such a way that the' plunger 4 will receive the required reciprocating motion, through an element 18, or any other device which will accomplish the purpose'. Onv each side' of the plunger and piston, 4 and 17, and located in the line 13 are suitably formed check valves 19 and 20. Y

The main suction inlet passage 10 isv provided in this invention with suitably located openings 21 and-22 for the purpose of receiving in open communication therewith auxiliary suction lines 23 and 24 which may be made of flexible hose, or otherwise, and connected through suitable fittings 25 and 26 to valves 27 and 28, arranged for the purpose of 1 allowing the suction to operate in either the bow or 'stern of the boat as may be desired, a third valve 29 being located in the suction inlet passage l0 below the openings 2l and 22 for the purpose of closing oif the suction to the center bottoin' portion of the boat when# ever desired.Y Y

The ejector casing 8 may be constructed in any manner suitable for the purpose, and

nicating with the conduit between the valves', an imperforate plunger in the cylinder, a

conduit leading from the interior of the ves-.

sel to the suction chamber of said ejector, flexible branch conduits leading from the `said interior conduit to the vicinity of said engine and tank, respectively, independently operable cut-off valves inthe interior and branch conduits, and an-other conduit leadingrfrom the discharge end of said ejector to lthe exterior of the vessel.

In testimony whereof I ailX my signature.

v`j SOLOMON EDWARD AARON.

" The lower end of the suction line ll) is fitted with a bilge suction strainer 3G of proper construction, while the free ends of the ylines 23 and 24 are fitted with strainers 37 and 38 having a suitable number of holes located therein. f' t This invention provides a pumping system havingthree different suctions in different locations in the boat, and each one -of'the suctions will render useful serviceeither separately or collectively as desired by the operator'. rOnly one ejector will be required in this, system.-

It is readily apparent from the above de- 4; scription that the gases could be drawn from lto f the stern of the boat by closing valves 28 and 29, or from the bow of the boat by Vclosing valves 27 and 29. In case the bilge -suction line 10 is desired to be used exclusively, the valves 27 and 28 should remain closed, or the bilge suction l() and bow suction 24 could be used together by closing the valve 27 and opening the valves 28 and 29.

As a matter of fact, numerous operative elements can be made between the three suction lines l0, 23 and 24, by merely manipulating the valves 27, 28 and 29, the single ejector l5 accomplishing all of the desired results.

It will befunderstoodl that many changes and modifications may be made in the form ofthe embodiment of the invention within the scope ofthe following claim without departing from the spirit thereof.

What I claim is:

The combination with a marine vessel having an engine and a gasoline tank, of an ejector, a conduit leading directly from un- Yder the water outside the vessel to the nozzle of the ejector, two'inwardly opening'check valves in said'conduiuav cylinder-commu- 

